We don't have synonyms for wadder yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are wander, ladder and warder.
(n) :
Pronunciation spelling of water [(uncountable) An inorganic compound (of molecular formula H₂O) found at room temperature and pressure as a clear liquid; it is present naturally as rain, and found in rivers, lakes and seas; its solid form is ice and its gaseous form is steam.]
(v) :
Pronunciation spelling of water [(transitive) To pour water into the soil surrounding (plants).]
(n) :
Pronunciation spelling of water [(uncountable) An inorganic compound (of molecular formula H₂O) found at room temperature and pressure as a clear liquid; it is present naturally as rain, and found in rivers, lakes and seas; its solid form is ice and its gaseous form is steam.]
(v) :
Pronunciation spelling of water [(transitive) To pour water into the soil surrounding (plants).]